import com.alibaba.fastjson.JSONObject;

/**
 * @Author lizhenchao@atguigu.cn
 * @Date 2021/6/26 9:28
 */
public class A {
    public static void main(String[] args) {
        JSONObject obj = new JSONObject();
        obj.put("a", 97);
        obj.put("b", 98);
        obj.put("c", 99);
        System.out.println(obj);
        obj.keySet().removeIf(key -> key.equals("a"));
    
        System.out.println(obj);
    
    }
}
